Compared with the same size of plastic gears, metal gears run well, temperature and humidity changes in the size of good stability. However, compared with metal materials, plastic in the cost, design, processing and performance has many advantages.

Compared with metal forming, the inherent freedom of design of plastic molding ensures a more efficient gear manufacturing. You can use plastic molding internal gears, gear sets, worm gear and other products, and it is difficult to a reasonable price to use metal materials to shape. Plastic gear applications are wider than metal gears, so they push the gear towards higher loads and deliver greater power. Plastic gears are also an important material to meet the requirements of low-quiet operation, which requires high precision, new profile and lubricity or flexibility of the material appears.

Plastic-made gears generally do not require secondary machining, so a 50% to 90% reduction in cost is guaranteed relative to stamping parts and machined metal gears. Plastic gears are lighter and inert than metal gears and can be used in metal gears that are easily corroded and degraded, such as water meters and chemical equipment.

Compared with metal gears, plastic gears can be deflected to absorb the impact load, better dispersion of the shaft deflection and misalignment caused by local load changes. The inherent lubricity of many plastics makes them ideal for gears in printers, toys and other low-load operating mechanisms, and does not include lubricants. In addition to running in a dry environment, the gear can also be lubricated with grease or oil.